Parameters

When sending back an LDAP_NO_SUCH_OBJECT result code,
use this argument to specify the portion of the target DN that could be matched.
(Pass NULL in other situations.)

text

Error message that you want sent back to the client. (Pass NULL if
you do not want an error message sent back.)

nentries

When sending back the result code for an LDAP search operation, use
this argument to specify the number of matching entries found.

urls

When sending back an LDAP_PARTIAL_RESULTS result
code to an LDAP v2 client or an LDAP_REFERRAL result code
to an LDAP v3 client, use this argument to specify the array of berval structures containing the referral URLs.
(Pass NULL in other situations.)